Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 752:
1920, 5c orange and magenta, inverted numeral and black overprint ”Colonia Eritrea”, bottom sheet margin block of four, full OG, NH, F/VF and rare double error multiple, expertized by Dr. Bolaffi, G. Oliva and others, C.v. $2,200 as hinged singles, Sassone #14a, C.v. €6,000 as singles, Est. $1,000-$1,200, Scott #J1bc
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